package com.project.fortuneteller.utils;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

/**

 * 注意！此类所得到的农历日期是正确的，但年份是错误的。故，只使用其计算所得的农历日期。 例如： Calendar cal =

 * Calendar.getInstance(); cal.set(1973,4,5); Lunar lunar = new Lunar(cal);

 * System.out.println(lunar.toString());//计算输出阴历日期

 *

 * */

public class Lunar {

    private int year;

    private int month;

    private int day;

    private boolean leap;

    final static String chineseNumber[] = { "正", "二", "三", "四", "五", "六", "七",

            "八", "九", "十", "十一", "腊" };

    final static String chineseNumber1[] = { "一", "二", "三", "四", "五", "六", "七",

            "八", "九", "十", "十一", "十二" };

    static SimpleDateFormat chineseDateFormat = new SimpleDateFormat(

            "yyyy年MM月dd日");

    /**
     * 做 一个 Hash 函数 的 映射
     */

    final static long[] lunarInfo = new long[] { 0x04bd8, 0x04ae0, 0x0a570,

            0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2,

            0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0,

            0x0ada2, 0x095b0, 0x14977, 0x04970, 0x0a4b0, 0x0b4b5, 0x06a50,

            0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, 0x06566,

            0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0,

            0x1c8d7, 0x0c950, 0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4,

            0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 0x06ca0, 0x0b550,

            0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950,

            0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260,

            0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0,

            0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6,

            0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40,

            0x0af46, 0x0ab60, 0x09570, 0x04af5, 0x04970, 0x064b0, 0x074a3,

            0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, 0x0c960,

            0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0,

            0x092d0, 0x0cab5, 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9,

            0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, 0x07954, 0x06aa0,

            0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65,

            0x0d530, 0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0,

            0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 0x0b5a0, 0x056d0, 0x055b2,

            0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0 };

// ====== 传回农历 y年的总天数

    private static int yearDays(int y) {

        int i, sum = 348;

        for (i = 0x8000; i > 0x8; i >>= 1) {

            if ((lunarInfo[y - 1900] & i) != 0)

                sum += 1;

        }

        return (sum + leapDays(y));

    }

// ====== 传回农历 y年闰月的天数

    private static int leapDays(int y) {

        if (leapMonth(y) != 0) {

            if ((lunarInfo[y - 1900] & 0x10000) != 0)

                return 30;

            else

                return 29;

        } else

            return 0;

    }

// ====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0

    private static int leapMonth(int y) {

        return (int) (lunarInfo[y - 1900] & 0xf);

    }

// ====== 传回农历 y年m月的总天数

    final private static int monthDays(int y, int m) {

        if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)

            return 29;

        else

            return 30;

    }

// ====== 传回农历 y年的生肖

    final public String animalsYear() {

        final String[] Animals = new String[] { "鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };

        return Animals[(year - 4) % 12];

    }

// ====== 传入 月日的offset 传回干支, 0=甲子

    final private static String cyclicalm(int num) {

        final String[] Gan = new String[] { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };

        final String[] Zhi = new String[] { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };

        return (Gan[num % 10] + Zhi[num % 12]);

    }

// ====== 传入 offset 传回干支, 0=甲子

    final public String cyclical() {

        int num = year - 1900 + 36;
        return (cyclicalm(num));

    }

    /**

     * 传出y年m月d日对应的农历. yearCyl3:农历年与1864的相差数 ? monCyl4:从1900年1月31日以来,闰月数

     * dayCyl5:与1900年1月31日相差的天数,再加40 ?

     *

     * @param cal

     * @return

     */

    public Lunar(Calendar cal) {

        int yearCyl, monCyl, dayCyl;

        int leapMonth = 0;

        Date baseDate = null;

        try {

            baseDate = chineseDateFormat.parse("1900年1月31日");

        } catch (ParseException e) {

            e.printStackTrace(); // To change body of catch statement use

// Options | File Templates.

        }

// 求出和1900年1月31日相差的天数

        int offset = (int) ((cal.getTime().getTime() - baseDate.getTime()) / 86400000L);

        dayCyl = offset + 40;

        monCyl = 14;

// 用offset减去每农历年的天数

// 计算当天是农历第几天

// i最终结果是农历的年份

// offset是当年的第几天

        int iYear, daysOfYear = 0;

        for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {

            daysOfYear = yearDays(iYear);

            offset -= daysOfYear;

            monCyl += 12;

        }

        if (offset < 0) {

            offset += daysOfYear;

            iYear--;

            monCyl -= 12;

        }

// 农历年份

        year = iYear;

        yearCyl = iYear - 1864;

        leapMonth = leapMonth(iYear); // 闰哪个月,1-12

        leap = false;

// 用当年的天数offset,逐个减去每月(农历)的天数，求出当天是本月的第几天

        int iMonth, daysOfMonth = 0;

        for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++) {

// 闰月

            if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap) {

                --iMonth;

                leap = true;

                daysOfMonth = leapDays(year);

            } else

                daysOfMonth = monthDays(year, iMonth);

            offset -= daysOfMonth;

// 解除闰月

            if (leap && iMonth == (leapMonth + 1))

                leap = false;

            if (!leap)

                monCyl++;

        }

// offset为0时，并且刚才计算的月份是闰月，要校正

        if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1) {
            if (leap) {
                leap = false;
            } else {
                leap = true;
                --iMonth;
                --monCyl;
            }
        }
// offset小于0时，也要校正
        if (offset < 0) {
            offset += daysOfMonth;
            --iMonth;
            --monCyl;
        }
        month = iMonth;
        day = offset + 1;
    }

    public static String getChinaDayString(int day) {

        String chineseTen[] = { "初", "十", "廿", "卅" };

        int n = day % 10 == 0 ? 9 : day % 10 - 1;

        if (day > 30)

            return "";

        if (day == 10)

            return "初十";

        if (day == 20)

            return "二十";

        if (day == 30)

            return "三十";

        return chineseTen[day / 10] + chineseNumber1[n];

    }

    public String toString() {

        return (leap ? "闰" : "") + chineseNumber[month - 1] + "月"

                + getChinaDayString(day);

    }

    public String getChinaWeekdayString(String weekday) {

        if (weekday.equals("Mon"))

            return "一";

        if (weekday.equals("Tue"))

            return "二";

        if (weekday.equals("Wed"))

            return "三";

        if (weekday.equals("Thu"))

            return "四";

        if (weekday.equals("Fri"))

            return "五";

        if (weekday.equals("Sat"))

            return "六";

        if (weekday.equals("Sun"))

            return "日";

        else

            return "";

    }



      public static void main(String[] args) throws ParseException{
        Calendar today = Calendar.getInstance();
        today.setTime(new java.util.Date());//加载当前日期

      today.setTime(chineseDateFormat.parse("2024年6月16日"));//加载自定义日期 Lunar

      Lunar  lunar = new Lunar(today);

      System.out.print(lunar.cyclical()+"年");//计算输出阴历年份

      System.out.println(lunar.toString());//计算输出阴历日期

      System.out.println(lunar.animalsYear());//计算输出属相

      System.out.println(new java.sql.Date(today.getTime().getTime()));//输出阳历日期

      System.out.println("星期" +lunar.getChinaWeekdayString(today.getTime().toString().substring(0,3)));//计算输出星期几
    }


}